白术主要性状遗传分析与优良产地和优株选择

为期2 a,通过对全国8个省(市)20个产地白术Atractylodes mcrocephala秧苗(术栽)栽培遗传试验,发现白术根茎原药材规格质量参差不齐.主要原因是:种植材料非常混杂,至今尚无品种.遗传分析表明,各主要性状在产地间和个体间都存在广泛的遗传变异,而且大多数性状遗传力中等或强,进行选择可获得较好的遗传改良效果.根据白术遗传变异特点与产地试验和选优株实践,得出天台县石梁和临安市西天目山是白术优良产地,并制定了优株选择方法和标准.表3参4

Genetic analysis of main traits and selection of superior provenances and superior individuals of Atractylodes macrocephala

It was found through cultivation of Atractylodes macrocephala from 20 provenances distributed in 8 provinces and cities from 2003 to 2004 that there were great differences in standard and quality of original rhizomes of Atractylodes macrocephala.The main reasons for this phenomenon are that the materials to be planted are in chaos and there were no cultivars so far.A genetic analysis reveals that there are great genetic variations either between provenances or between individuals in terms of main traits,and most traits have a medium or high heredity.So selection might lead to good genetically improved results.On the basis of characteristics of genetic variation,provenance test and selection of superior individuals,it was found that Shiliang in Tiantai County and West Mount Tianmu in Lin'an City were good provenances of Atractylodes macrocephala.Methodology and standard for selection of superior individuals were worked out.Ch,3 tab.4 ref.]